cylon-leapmotion/spec/lib/adaptor.spec.js

Cylon module for the Leap Motion

"use strict";

var Adaptor = lib("adaptor");

var Cylon = require("cylon"),
    Leap = require("leapjs");

describe("Adaptor", function() {
  var adaptor = new Adaptor();

  it("subclasses Cylon.Adaptor", function() {
    expect(adaptor).to.be.an.instanceOf(Cylon.Adaptor);
    expect(adaptor).to.be.an.instanceOf(Adaptor);
  });

  describe("#connect", function() {
    var emit, handlers;

    beforeEach(function() {
      emit = adaptor.emit = spy();

      stub(Leap, "loop");
      adaptor.connect(function() {});

      handlers = Leap.loop.args[0][0];
    });

    afterEach(function() {
      Leap.loop.restore();
    });

    it("attaches a frame function to the LeapMotion event loop", function() {
      handlers.frame("frame");
      expect(emit).to.be.calledWith("frame", "frame");
    });

    it("emits gestures if they occur", function() {
      var gesture1 = {}, gesture2 = {};

      handlers.frame({ gestures: [gesture1, gesture2] });

      expect(emit).to.be.calledWith("gesture", gesture1);
      expect(emit).to.be.calledWith("gesture", gesture2);
    });

    it("attaches a hand function to the LeapMotion event loop", function() {
      handlers.hand("hand");
      expect(emit).to.be.calledWith("hand", "hand");
    });

    it("adds palm position accessors to the hand", function() {
      var parsed = {
        palmPosition: [ 0, 1, 2 ],
        _rotation: [ 0, 1, 2 ],

        palmX: 0,
        palmY: 1,
        palmZ: 2,

        rotation: {
          axis: 0,
          angle: 1,
          matrix: 2
        }
      };

      handlers.hand({ palmPosition: [ 0, 1, 2 ], _rotation: [ 0, 1, 2 ] });

      expect(emit).to.be.calledWith("hand", parsed);
    });
  });
});